During dialogue, its established that episode two is set apx one week after episode one.
The first time Tom and Barbara say that their cockerel is queer.
During Margot and Jerry's discussion on the "outside" of their home, on their own patio, being the set built in the studio, behind them is the "outside looking inside" view of the interior set of the lounge that we will get to know rather well over the run of the series. This establishes that the "fourth" wall the audience will look through into the lounge, within the story universe, has a tall dark wooden dresser against it, and also how big the room would be in the real world.
Barbara breaks all the greenhouse glass to get rid of it. It's useful and expensive so hardly the action of self-sufficiency.
Episode two shows both the real-world location front and back garden now ploughed up into the various sections. Its unclear how long this would really have taken, with-in the story universe, with just Tom and Barbara doing it, as episode one had bird eye views of both the front and back gardens establishing how big they really are. Viewers should also remember that this on-location filming in the front and back gardens, bar the more intimate studio patio scenes, was done for real, in a real residence, on a real street, and not built on a studio backlot.